Improvement in primers for cartridges



A. C. HOBBS.

'PRIMERS Fon cARTnIDGEs.

N ,.183,9Z.5. Patented oct. 31,1876.

' 1S', fr. Wnvd UNITED STATES PATENT OFFICEo ALFRED CHARLES HOBBS, OF BRIDGEPORT, GONNEO'IICUT.

IMPROVEMENT IN PRIMERS FOR CARTRIDGES.

Specification forming part of Letters Patent No. 1.8.3,925, dated Ootober`31, 1876; application filed February 28, 1876.

To all whom it may concern:

Be it known that 1, ALFRED CHARLES HOBBS, of the city of Bridgeport, State of' .Uonnecticut, have invented a new and useful Improvement in Primers for Cartridges 5 and l do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, making part of this specification, in which- 'i Figures 1, 2, and 3 represent vertical section through the plans or top views, Figs. 4,

. 5, and 6; and Figs. 7, 8, and 9 represent features-of several patents hereinafter referred to.

My invention relates to that class of primers adapted to central-tire shells for cartridges, in which the anvils upon which to explode the fulminate are inserted and retained in the pri mers.

The object of this invention, while it possesses all the advantages of the deep or oblong primers in common use, is to add the novel and important features` of shallow .or

'nate and ,anvils The anvils B consist of dat pieces of metal, havin g many edges or corners,- d, and so formed as to leave spaces r for the passage of the fiume of the fulminate to explode the charge of powder in the cartridge.

As in other primers, the fulminate ois placed in the bottoms ofthe cups A, and then covered with tin-foil, in the usual manner, to protect it, and, in a measure, to render it water-proof, with .the anvils resting thereon.'

It will be observed that the fulminate o, tin-foil C, and anvils'B, placed iatwise, fill, or nearly fill, the shallow cups even with their surfaces, as represented in -section in Figs. 4, 5, and 6;'and the edges d, by which theanwvls are reta-ined in position within the cups,

are formed by making the openings r for the passage of the flame of the'fulminate; and, in pressing-the anvils into position, the edges or corners d niay cutslightly into the inner surface of the cups, thereby so embedding them.- L

selves as to remain firmly therein.

By the formation of the openings r, for the passageof the flame of the fulminate, and by which the edges or corners d are made, the center of the anvils is left unbroken, and present solid surfaces upon which to explode the fulminate.

I am aware that patents have been granted for anvils lying in the cups atwise, as also upon edge, among which may be mentioned the French patent of Gevelot, dated March 5, 1855, formed with concentric surfaces bearing against the inner surfaces or peripheries of the cups, as represented by Fig. 7; also, the later patent granted by the United States to 0. F. Winchester, dated July 1 4, 1874, as represented by Fig. 8, which is similar in conliguration to Gevelots, of 1855; also, the patent of D. W. C. Farrington, granted by the United States, in which the anvil is a disk, the periphery of which 'fits the inside of the cup with the openings to admit the passage of the dame of the fulminate, as represented by Fig. 9, all of which present concentric surfaces bearing against the inner peripheries of the cups, and are either retained in the cups by compressing or turning the edges thereof over or around the concentric rims of the anvils, or are forced so slightly into Ithe on" s,- in order not to expand or enlarge them n diameter, that the anvils frequently dropout, thus destroying the primer altogether.

By the formation of the openings r, for the passage of the dame'of the fulminate, and by Which the edges or corners dareniadqthe centers of the anvils are left unbroken, and

present solid surfaces upon which to explode' the fulminate, and by the edges or corners so x 'Y made are firmly and securely held Within the cups. y

Having thus fully described my invention,

what I claim therein as new, and desire tosecure by Letters Patent, isy A primer for cartridges consisting of a shell or cup having an anvil placed tlatwise therein, and retained in position by theedges or corners thereof, ner herein set forth.

SMIL, T. HoUGHToN, HENRY G. RYEANDS.

substantially in the man;- l 

